Which logic gate is used to realize an inverted output?

The NAND gate is used to realize an inverted output because it performs a logical AND operation on its inputs and then negates the result. This means that the output of a NAND gate is low (0) only when all of its inputs are high (1); otherwise, the output is high (1).

When you consider the truth table for a NAND gate, it effectively acts like an AND gate followed by a NOT operation. For example, if both inputs are 1, the output is 0; for all other combinations of inputs, the output is 1. Hence, this property allows the NAND gate to serve as a versatile building block for creating various logic functions, including simple inverters.

In contrast, an AND gate outputs true only when all inputs are true, while an OR gate outputs true if at least one input is true. The XOR gate serves a different function by producing true when the inputs are different; none of these gates can provide the same inverted output functionality as the NAND gate. Thus, the NAND gate stands out for its ability to produce an inverted result directly from its inputs.